waterproofing a flat concrete roof
Hi All
ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards |
waterproofing a flat concrete roof
"TMC" wrote:
Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards Is there any provision for the rainwater to drain off or does it just puddle up and stay trapped? is there a fall? -- What else are opposable thumbs for? Get to me at masterfix{at}btinternet{dot}com |
waterproofing a flat concrete roof
"Dean Heighington" wrote in message ... "TMC" wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards Is there any provision for the rainwater to drain off or does it just puddle up and stay trapped? is there a fall? -- yep slight fall to the back with gutter and downpipe Regards |
waterproofing a flat concrete roof
TMC wrote:
Looking at the fibrous paints or other low cost solution any recommendations The usual solution in places like Italy where flat concrete roofs are normal is to lay a waterproof screed on the roof. This requires the roof to be clean and dry before you start. http://www.izonil.com/uk/improver.html For example. |
waterproofing a flat concrete roof
On 12/07/2011 23:38, TMC wrote:
ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution Sounds identical to one I did myself once. IIRC I used bitumen paint as a cheapo solution, as I knew I'd be selling the place not long afterwards. Seemed to do the job well enough; I can't vouch for it's longevity but think if I'd been intending on keeping the property for a long time I'd have chosen something more durable. Indeed, the purchaser's surveyor flagged it as a future maintenance issue. David |
waterproofing a flat concrete roof
On Jul 12, 11:38 pm, "TMC" wrote:
Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards epoxy paint - garage floor styley? can't see any +'s to "Fibrous" in that scenario? Jim K |
waterproofing a flat concrete roof
Lobster wrote:
On 12/07/2011 23:38, TMC wrote: ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution Sounds identical to one I did myself once. IIRC I used bitumen paint as a cheapo solution, as I knew I'd be selling the place not long afterwards. Seemed to do the job well enough; I can't vouch for it's longevity but think if I'd been intending on keeping the property for a long time I'd have chosen something more durable. Indeed, the purchaser's surveyor flagged it as a future maintenance issue. David yeah. Concrete itself is pretty impervious, depending on the grade. Anything that soaks in a bit of a plasticky or tarry nature will improve it immensely. Probably one of those render waterproofers will do. |
waterproofing a flat concrete roof
"The Natural Philosopher" wrote in message ... Lobster wrote: On 12/07/2011 23:38, TMC wrote: ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution Sounds identical to one I did myself once. IIRC I used bitumen paint as a cheapo solution, as I knew I'd be selling the place not long afterwards. Seemed to do the job well enough; I can't vouch for it's longevity but think if I'd been intending on keeping the property for a long time I'd have chosen something more durable. Indeed, the purchaser's surveyor flagged it as a future maintenance issue. David yeah. Concrete itself is pretty impervious, depending on the grade. Anything that soaks in a bit of a plasticky or tarry nature will improve it immensely. Probably one of those render waterproofers will do. good thoughts I will investigate further as I think that the problem is a crack in the concrete |
waterproofing a flat concrete roof
TMC wrote:
Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards having atempted all of the suggestions in this thread over the past thirty years, I have found only one solution and that is to use a product called 'cromapol' http://www.nwepaints.co.uk/acatalog/...nCoatings.html I've done a few concrete rooves with this and had no problems at all, it's expensive, because it works. Don't bother with anything available from B&Q et al, they also have expensive sealants, but none of them work on cracked concrete It's available in black, white and grey |
waterproofing a flat concrete roof
"TMC" wrote:
"Dean Heighington" wrote in message ... "TMC" wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards Is there any provision for the rainwater to drain off or does it just puddle up and stay trapped? is there a fall? -- yep slight fall to the back with gutter and downpipe Regards Having read all the other posts since my reply this am, I would also recommend the cromapol product or there's another called aquapol, I think... Check out JJ Roofing supplies or Wedge roofing, but again, it's not cheap- about £90 a tin retail, £60 trade. For a cheaper way of remedying it as a trial.... If you can find the crack get a tube of Sika Flex http://m.screwfix.com/details.htm?id=79250 and use that to fill the joint, it's great stuff. Hth Deano -- What else are opposable thumbs for? Get to me at masterfix{at}btinternet{dot}com |
waterproofing a flat concrete roof
Phil L wrote:
TMC wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards having atempted all of the suggestions in this thread over the past thirty years, I have found only one solution and that is to use a product called 'cromapol' http://www.nwepaints.co.uk/acatalog/...nCoatings.html I've done a few concrete rooves with this and had no problems at all, it's expensive, because it works. Don't bother with anything available from B&Q et al, they also have expensive sealants, but none of them work on cracked concrete It's available in black, white and grey Cracked is different from porous, sure. I'd probably use epoxy mortar on cracks, but that stuff looks a useful thing to know as well |
waterproofing a flat concrete roof
On Jul 13, 5:36 pm, "Phil L" wrote:
TMC wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards having atempted all of the suggestions in this thread over the past thirty years, I have found only one solution and that is to use a product called 'cromapol' http://www.nwepaints.co.uk/acatalog/...nCoatings.html I've done a few concrete rooves with this and had no problems at all, it's expensive, because it works. Don't bother with anything available from B&Q et al, they also have expensive sealants, but none of them work on cracked concrete It's available in black, white and grey cracked? Jim K |
waterproofing a flat concrete roof
"Jim K" wrote in message ... On Jul 13, 5:36 pm, "Phil L" wrote: TMC wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards having atempted all of the suggestions in this thread over the past thirty years, I have found only one solution and that is to use a product called 'cromapol' http://www.nwepaints.co.uk/acatalog/...nCoatings.html I've done a few concrete rooves with this and had no problems at all, it's expensive, because it works. Don't bother with anything available from B&Q et al, they also have expensive sealants, but none of them work on cracked concrete It's available in black, white and grey cracked? Jim K Thanks for all of the replies I will do a proper investigation this weekend the aquapol/cromapol solution looks a good idea for now regards |
waterproofing a flat concrete roof
Jim K wrote:
On Jul 13, 5:36 pm, "Phil L" wrote: TMC wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards having atempted all of the suggestions in this thread over the past thirty years, I have found only one solution and that is to use a product called 'cromapol' http://www.nwepaints.co.uk/acatalog/...nCoatings.html I've done a few concrete rooves with this and had no problems at all, it's expensive, because it works. Don't bother with anything available from B&Q et al, they also have expensive sealants, but none of them work on cracked concrete It's available in black, white and grey cracked? Jim K TMC mentioned it was cracked at 16:48 yesterday |
waterproofing a flat concrete roof
On Jul 14, 5:16 pm, "Phil L" wrote:
Jim K wrote: On Jul 13, 5:36 pm, "Phil L" wrote: TMC wrote: Hi All ex council house outside store roof 100mm thick concrete area about 4m x 3 metres has rasied front and sides (a lip about 25mm high) Never been felted Looking at the fibrous paints or other low cost solution any recommendations Regards having atempted all of the suggestions in this thread over the past thirty years, I have found only one solution and that is to use a product called 'cromapol' http://www.nwepaints.co.uk/acatalog/...nCoatings.html I've done a few concrete rooves with this and had no problems at all, it's expensive, because it works. Don't bother with anything available from B&Q et al, they also have expensive sealants, but none of them work on cracked concrete It's available in black, white and grey cracked? Jim K TMC mentioned it was cracked at 16:48 yesterday so he did - shame his comments weren't initially visible as they seem to be mixed/confused with NatnyP's - unfortunate;) Jim K |
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